For the purposes of the National Firearms Act the term Machinegun means:
- Any weapon which shoots, is designed to shoot, or can be readily restored to shoot,automatically more than one shot without manual reloading, by a single function of the trigger
- The frame or receiver of any such weapon
- Any part designed and intended solely and exclusively or combination of parts designed and intended for use in converting a weapon into a machinegun, or
- Any combination of parts from which a machinegun can be assembled if such parts are in the possession or under the control of a person.
A rifle having a barrel or barrels of less than 16 inches in length or a weapon made from a rifle if such weapon as modified has an overall length of less than 26 inches or a barrel or barrels of less than 16 inches in length.
A shotgun having a barrel or barrels of less than 18 inches in length or a weapon made from a shotgun if such weapon as modified has an overall length of less than 26 inches or a barrel or barrels of less than 18 inches in length.
AOW (Any Other Weapon)
- Any weapon or device capable of being concealed on the person from which a shot can be discharged through the energy of an explosive;
- A pistol or revolver having a barrel with a smooth bore designed or redesigned to fire a fixed shotgun shell;
- Weapons with combination shotgun and rifle barrels 12 inches or more, less than 18 inches in length, from which only a single discharge can be made from either barrel without manual reloading; and
- Any such weapon which may be readily restored to fire.
Such term shall not include a pistol or a revolver having a rifled bore, or rifled bores, or weapons designed, made, or intended to be fired from the shoulder and not capable of firing fixed ammunition.
Silencers or Suppressor
The term “Firearm Silencer” or “Firearm Muffler” means any device for silencing, muffling, or diminishing the report of a portable firearm, including any combination of parts, designed or redesigned, and intended for the use in assembling or fabricating a firearm silencer or firearm muffler, any part intended only for use in such assembly or fabrication. See 18 U.S.C., § 921(A)(24)
For the purposes of the National Firearms Act, the term “Destructive Device” means:
- A missile having an explosive or incendiary charge of more than 1/4 oz.
- Any type of weapon by whatever name known which will, or which may readily be converted to expel a projectile, by the action of an explosive or other propellant, the barrel or barrels of which have a bore greater than one-half inch in diameter.
- A combination of parts designed and intended for use in converting a device into a destructive device and from which a destructive device can be readily assembled.
Exemptions to Destructive Devices:
- a shotgun or shotgun shell which is determined by the Attorney General to be generally recognized as particularly suitable for sporting purposes.
- a device which is neither designed nor redesigned for use as a weapon, a device which is designed or redesigned for use as a signaling, pyrotechnic, line – throwing, safety, or similar device,
- surplus ordnance sold, loaded, or given by the Secretary of the Army pursuant to law such as antique, obsolete bronze or iron cannon,
- a device which the Attorney General determines is not likely to be used as a weapon.
- an antique firearm, or
- a rifle which the owner intended to use solely for sporting purposes.See: 26 U.S.C. § 5845(F)